Electrochemical and Photochemical Reduction of CO<sub>2</sub> Catalyzed by Re(I) Complexes Carrying Local Proton Sources
作者:Laura Rotundo、Claudio Garino、Emanuele Priola、Daniele Sassone、Heng Rao、Bing Ma、Marc Robert、Jan Fiedler、Roberto Gobetto、Carlo Nervi
DOI:10.1021/acs.organomet.8b00588
日期:2019.3.25
corresponding Mn derivatives Mn(pdbpy)(CO)3Br, 3, and Mn(ptbpy)(CO)3Br, 4, has been also considered. Finally, photostimulated conversion of the CO2 was investigated with catalysts (1, 3, and 4) under visible light irradiation (λ > 420 nm) in acetonitrile as solvent. Remarkably, 1 and 3 catalysts were active toward CO2, producing formate with good selectivity and turnover number (TON). For example, 3 gives 62%
新型rh络合物fac -Re(pdbpy)(CO)3 Cl(pdbpy = 4-苯基-6-(苯基-2,6-二醇)-2,2'-联吡啶)1和fac -Re(ptbpy )(CO)3 Cl(ptbpy = 4-苯基-6-(苯基-3,4,5-三醇)-2,2'-联吡啶)2的合成,单晶X射线衍射(解决了1的SC-XRD)结构。讨论了该络合物在Ar气氛下在乙腈中的电化学行为,以及它们在添加水和MeOH的条件下对CO 2还原的催化性能。在Ar和CO 2下进行详细的红外光谱电化学研究大气与DFT计算相结合,可以识别减少的物种并解释减少的机制。还考虑了the配合物与相应的Mn衍生物Mn(pdbpy)(CO)3 Br,3和Mn(ptbpy)(CO)3 Br,4之间的比较。最后,将CO的光激励转换2用催化剂(研究1,3和4在乙腈作为溶剂可见光照射(λ> 420纳米)下)。值得注意的是,有1和3种催化剂对CO 2具